We have developed some new perovskites based ceramics for thermoelectric measurements. We do not have facilities for measuring their thermoelectric figure of merit. The question is intended to those who could suggest the experimental set up for such measurements with some details.
Some dipole moments could be aligned at elevated temperature using strong electric field (poling). It results in the preference of certain domain states and ensures the macroscopic anisotropy of material. Poling field must be higher than coercive field in order to get stable material properties. Some materials have the dipole moments in the structure and therefore, the higher poling temperature allows easier domain wall mobility and poling. Poling temperature should not exceed Curie temperature (TC), which is a limit for the dipole moment existence and ferroelectricity. Poling also results in domain wall movements and in the grain deformation.
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